Gas line control system and modular variable pressure controller
AssigneeVRG Controls, LLC
InventorsJames Michael Garvey, Vladimir Rimboym
Life of this patent
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Abstract
A pneumatically controlled assembly, system, method and device for the regulation of pressure of a gas as it flows in a pressurized line and including at least one loading valve which is set to respond to variations in pressure in conjunction with a pneumatically actuated process control valve so as to effectively regulate and maintain pressure of the gas in the pressurized line.
Claims19
A pneumatic valve pressure controller system comprising:
- a fluid supply line having an inlet end and an outlet end;
- a process process control valve fluidly connected to the fluid supply line between the inlet end and the outlet end;
- a supply regulator fluidly coupled to the fluid supply line upstream of the process process control valve;
- an actuator operably connected to the process process control valve and having a first pressure chamber and a second pressure chamber;
- a sensing diaphragm connected to the fluid supply line for determining a relative pressure in the fluid supply line on the outlet end side of the process process control valve;
- a first loading valve fluidly coupled to the first pressure chamber and responsive to the sensing diaphragm;
- and
- a second loading valve fluidly coupled to the second pressure chamber and responsive to the sensing diaphragm;
- wherein the first loading valve and the second loading valve open and close in response to the sensing diaphragm to change a position of the actuator and thereby operate the process process control valve.
A method for controlling a fluid supply through a delivery line having a process control valve therein to maintain a supply side pressure and a delivery side pressure, and a pneumatic actuator having a first pressure chamber and a second pressure chamber and used to operate the process control valve, the method comprising the steps of:
- setting a delivery side target pressure range for the fluid supply;
- sensing the delivery side pressure;
- operating the pneumatic actuator in one of the following ways:
- maintaining the actuator in a static state when the delivery side pressure is within the target range;
- moving the actuator to open the process control valve when the delivery side pressure is below the target range;
- and
- moving the actuator to close the process control valve when the delivery side pressure is above the target range;
- wherein, the first and second pressure chambers of the actuator are responsive to a first loading valve fluidly coupled to the first pressure chamber and a second loading valve fluidly coupled to the second pressure chamber, and the first loading valve and the second loading valve open and close in response to the delivery side pressure to change a position of the actuator and thereby operate the process process control valve.
A variable pressure controller for use in a fluid delivery system, the controller comprising:
- a first fluid interface for coupling to a fluid line upstream of a process control valve;
- a sensing mechanism positioned at the first fluid interface and responsive to a pressure in the fluid line upstream of a process control valve;
- a first internal loading valve responsive to the sensing mechanism;
- a second internal loading valve responsive to the sensing mechanism;
- a first manifold comprised of two outlet ports, wherein one outlet port is coupled to a first channel fluidly coupled to the first internal loading valve and one outlet port is coupled to a second channel fluidly coupled to the second internal loading valve;
- and
- a second manifold comprised of two outlet ports, wherein one outlet port is coupled to a first channel fluidly coupled to the first internal loading valve and one outlet port coupled to a second channel fluidly coupled to the second internal loading valve.
Dependencies are inferred from the claim text.